This page has been validated.
THE PLANET VENUS
525
cessive images of what is contained by the slit are presented arranged according to their wave-lengths. In practise the rays of light from the slit enter a small telescope called the collimator, and are there rendered
Sketches of the Planet Venus.
Sketches of different observers showing agreement, made at Tacubaya, Mexico, on February 7, 1897.
Sketches of different observers showing agreement, made at Tacubaya, Mexico, on February 7, 1897.
